Process for the manufacture of alkali-metal silicates



CAEZIELE DEQLUEE, Q13 memoir, mucus PROCEgg FOR THE MANUFACTURE ALEAEX KiETAL SELECAKEQ.

13c Drawing.

To all wilmnit may concern:

Be it known thct l, CAMIIM: Dsemon, n subject of the King of Belgium, end. a, mudent of Enghien, Seine et Oise, France, have invented new cnu useful Improvements inc Process for the Mcnufccture of Alkali-ltletnl Silicetes, of which the followin is a specification,

lhis invention relates to e prccws for the manufacture of elkuli-metel silicates, It is based upon the cppliccnts discovery thet the silicates of barium, instead of hefi stchle compounds, us is generally admit are on the contrcry unstcble in presence cl Wfitfill" and alkali motel carbonates or sulphctes The proce% according to the present in vention consigs in decomposing a siliccte oi hcrium hy u eter end an alkali-metal corhonete or photo,

(a), The process muy start, for example, from monohorytic silicate; the letter, in u very finely divhlerl state is placed in cus pension in Water containing in solution on alkali-metal carbonate or sulphate. The temperstuie is reiseol, for example by the injection of steam, to about 80 (3.; one of the following reactions then takes plscet== 816 3210 esuo ns copm sioa nice @1120. (1 siozcao enzo Na SQ =Na Si0 Base, mic. 2

Similar reactions are obtained with other alkali-metal csrhonctes or sulphates.

The alkali-metal silicates in. solution ere scpcrcted from the recipitcted bsrium cerhonetc or sul'phste y decantation or filtrw tion; they are then concentratecl, if neces- Biherytic silicate, in it very finely divi ed. state, is placed in suspension in v ulster containing clkcli-metsl carbonates or sulphates. One of the following mswions takes place:

SiO QBaLO @18 0 2Na CO $0 2330 snzt flhlilfi (Hmfi' i Nah-810a 2NuOH 2Baso, (o-DHQ. e The same reactions take place with other slmli-metcl carbonates or sulphates. Here again the soluble portion is separatetl from the recipitcte by decantation or filtration. (c it is evident that if the reaction were started from a silicate intermediate between the monobarytic and bihcrytic silicates (that is, a mixture of monoberytic silicate and helium oxide) or it silicate inhy water and en slkcli-mctsl sul- Application is December cc, icci. mm seems,

tcnneoicte between the 'hihcrytic and trihcrytic silicates, end so on, there wouldclways he ohtcincd u mixture of alkali-metal silicate and ulhcli mete-l hydrate, aswell as barium curhonute or sulphate ln orcler to produce the difierent silicates of barium, neeesseiy for ccrryin out the process, one of the following met he adagtexl:

- (l) n tunnel furnace or rotery lurnsce there is calcined. at shout moo-1400 G, e mixture oi silicc chi hurium cerhoncte: j I

eds may There is thus obtained usilicute of he rium, more or less msic, coco-oiling to the proportions of the elements in wee the furncce yielus e silicute of too great hssicity, for exumplc c tiibcrytic silicate, the letter con be reseorefi to the state of monoherytic siliccte by treating it with hot ureter; the

end con he incoverefi.

(2?) Silics many he cclcinedl with s minexcess'of hcriuin hydrous-is thus eliminated ture of herium sulphate cni cerhon; one of i the following motions tclies piece 2 sun nesot c=siogsao so co. sic2 misc, 2C==SKOZ2BQO cs0, 200. (a 940;; clause4 3C=Si0 .3Bu0 cso coo.

These resctions can he curried out in c rotary cement kiln or tunnel furnace, at shout 114E69-l5ll1l (3.; here again if the hop reactions (5), to the helium ccrhonste oh- 109 tcined by the resctions (1) end (3)), or hy cdilingsilicc one carbon, es indiccted in the reactions (6), to the horium sulphcte ohtsined according to the reemions ((2) end 4%), and cerrrin the mixture to n tem reture of to W (1, in s tunnel or rotsrv furnsce,

l he process of manufacture of alkalimetsl silicates, which forms the subject of the present invention, can thus he can'ied 110 out in a continuous manner. The slkuli met-cl silicates obtsinei may be utilized as such in member 36, as shown herein, globular in form comprising an enlarged chamber 27. This has the efi'ect of: slowing the velocity of the stream of incoming gas as it passes through the chamber, with the result that the larger particles of unevaporated liquid will, under the influence of gravity, tend to.

fall back, resulting in their being thrown to the side and against the walls of heated member 36.

Theadvantages of my invention will be obvious. llts reatest use is in connection with the burning of liquid fuels of a relatively heavy character, such as kerosene, crude oil, and various forms of distillate. Such fuels are hard to break up into gaseous form, and tend to pass from the carbureter in small particles or drops. If these unevap orated particles reach the manifold and the engine cylinders, flooding and serious engine trouble may result. It is obvious that the heating member 36, being in the main stream of the entire exhaust, will be heated very hot so that any particles of liquid striking the same, will be instantly vaporized, such evaporation resulting in keeping the temperature of the heating member down suflicie'ntly to prevent preignition. lit is not, however, desirable at all times or speeds with any given-fuel, or at all with some fuels, to employ the heating member 36. Under such circumstances with the double exhaust device and the cock18, hand controlled through arm and connecting member 31, it is always possible to cut out the heating of member 36 whenever desired, and also to any degree desired, for it is clear that the portion 19 of cock 18 may be made to cover, completely the opening either from pipe 14 or bend 16, or may be made to cover more or less each of said openings, resulting in a greater or less flow of hot gases through pipe 1t and heating member 36. At high speeds when the weight of the mixture going to the cylinders in proportion to its volume should be as great as possible, it is usually desirable to cut out the heater entirely, unless the fuel used is so heavy that the heater can be advantageously used in breaking up the heavy particles passing through pipe 24: and precipitated against the interior: walls of chamber 27.

ml claim:

An intake device for gas engines comprising an exhaust pipe formed in two interconnected sections, one of said sections being connected with the cylinders of the engine, an intake manifold secured upon the other section and having a connection with the carburetor extending through and surrounded by said other section, and controllable means for causing varying quantities of the exhaust gases to'pass through said last mentioned pipe section.

In testimony whereof I affix my signature.

Asrninr o. BENNETT. 

